As for layers, at the moment you can at least move it to the left or right side where it might take up less space for you depending on what you’re doing.

You can do Hue/Saturation only on the current layer by clicking the layer before hitting the shortcut. IMO I think the problem is that the program gets locked when you open up the Hue/Saturation window so you can’t click a layer afterwards, but I’ve got a github issue up about that, so you can thumbs up it for visibility if you want.